CN101200326B - Device for adjusting pH value of waste water - Google Patents
Device for adjusting pH value of waste water Download PDFInfo
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- CN101200326B CN101200326B CN2006101473436A CN200610147343A CN101200326B CN 101200326 B CN101200326 B CN 101200326B CN 2006101473436 A CN2006101473436 A CN 2006101473436A CN 200610147343 A CN200610147343 A CN 200610147343A CN 101200326 B CN101200326 B CN 101200326B
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Abstract
The invention discloses a wastewater PH value adjusting device, which comprises a water transportation pipeline that is arranged with a wastewater transportation pump for pumping wastewater from wastewater tank and an acid and alkali switching sensor for measuring PH value of wastewater; a medicine-adding actuator that comprises an acid medicine box and an alkali medicine box, the acid medicine box and the alkali medicine box output the medicament, the outlets of the acid medicine box and the alkali medicine box are arranged with an acid adding valve and an alkali adding valve, the medicine adding pipeline is arranged with a medicine adding pump; an ultimate adjusting reactor that comprises a final mixer for transporting wastewater and acid medicament or alkali medicament to perform rapid mixing reaction; a ultimate balancer that collects the wastewater outputted from the mixer and then discharges; a controller that is electrically connected with the acid and alkali switching sensor, the acid adding valve, the alkali adding valve and the medicine adding pump, the controller can compare the PH value of the wastewater measured by the acid and alkali switching sensor and the target PH value, according to the comparative result, the operations of the medicine adding pump and the opening and closing of the acid adding valve and the alkali adding valve can be controlled. The pipe type reactor of the invention reduces the volume of equipment greatly and also improves PH value control precision of wastewater.
Description
Technical field
The present invention relates to a kind of wastewater treatment equipment, relate in particular to a kind of device for adjusting pH value of waste water.
Background technology
The adjusting of pH value is the general procedure in the wastewater treatment process, satisfies technological requirement or emission standard requirement by measurement of pH value and adding of soda acid.Wastewater pH is regulated and is relied on the manual control proportion very big at present, uses the pH test paper, and the variation of range estimation pH value adds acid or alkali by experience.Because the degree of accuracy of regulating relies on coarse test paper and people's experience, so the control effect that often can not get.
Wastewater treatment pH automatic adjustment technology had had development faster in recent years, and main the employing transferred ON/OFF position formula pH control technology.Its shortcoming is that the volume of reactor is bigger, and control accuracy is relatively poor.A processing power 15m
3The volume of the automatic conditioned reaction device of the one-level pH of/h is greater than 3m
3, and reactor must be equipped with more powerful stirring machine.Because the reactor conference causes control hysteresis, so general control accuracy can only reach set point ± 0.5～1pH.The excessive reaction device can increase manufacturing cost and floor area, can cause that control of quality is bad and medicament delivery is excessive and precision is low.
Summary of the invention
The object of the invention is to provide a kind of control accuracy height, device for adjusting pH value of waste water that volume is little.
The present invention solves the problems of the technologies described above the technical scheme that adopts to provide a kind of device for adjusting pH value of waste water, comprising:
One hydraulic pipeline which is provided with the soda acid switching sensor that a waste water discharge pump and that extracts waste water from wastewater trough is measured pH value of waste water;
One dosing actuator comprises sour medicine-chest and alkali medicine-chest, and described sour medicine-chest and alkali medicine-chest are through dosing pipe output acid medicine or basic agent, and the outlet of sour medicine-chest is provided with acid adding valve, and the outlet of alkali medicine-chest is provided with alkali addition valve, and described dosing pipe is provided with dosing pump;
One whole conditioned reaction device comprises: whole level mixer, and input waste water and acid medicine or basic agent carry out rapid mixing and reaction; Whole level equaliser is assembled from the waste water of described mixer input and is discharged then;
One controller, be electrically connected to described soda acid and switch sensor, acid adding valve, alkali addition valve and dosing pump, the more described soda acid of described controller switches the pH value of waste water and a target pH value of sensor measurement, controls the switching of described acid adding valve, alkali addition valve and the operation of described dosing pump according to comparative result.
In the described device for adjusting pH value of waste water, described whole level equaliser outlet is provided with the pH value sensor that is used to measure the outlet pH value of waste water, described pH value sensor is connected with described controller, described controller calculates the pH value of waste water of whole level equaliser outlet and the deviation of a target pH value, adjusts the flow of described dosing pump in view of the above.
In the described device for adjusting pH value of waste water, the outlet of described whole level equaliser is provided with delivery pipe, and described delivery pipe is provided with bleed valve, and described bleed valve is electrically connected with described controller.
In the described device for adjusting pH value of waste water, the outlet of described whole level equaliser is provided with recirculatory pipe, and described recirculatory pipe is communicated to described wastewater trough, and recirculatory pipe is provided with reverse flow valve, and described reverse flow valve is electrically connected with described controller.When outlet pH value of waste water miss the mark pH value reference mark that described pH value sensor records, controller cuts out bleed valve, opens reverse flow valve, makes return of waste water to wastewater trough.
Described device for adjusting pH value of waste water also comprises a preconditioning reactor, is located between described hydraulic pipeline and the described whole conditioned reaction device, and the preconditioning reactor comprises:
Elementary mixer from described hydraulic pipeline and described dosing pipe input waste water and acid medicine or basic agent, carries out rapid mixing and reaction respectively;
Just level equaliser is assembled from the waste water of described elementary mixer input, exports described whole conditioned reaction device then to.
In the described device for adjusting pH value of waste water, the described outlet of level equaliser just is provided with the pH value sensor of the pH value of waste water that is used to measure outlet, described pH value sensor is connected with described controller, described controller calculates the pH value of waste water of level equaliser outlet just and the deviation of a pre-adjust pH, adjusts the flow of described dosing pump in view of the above.
Because adopt technique scheme, device for adjusting pH value of waste water of the present invention compared with prior art has following remarkable advantage:
1. the volume of device has been dwindled in the design of tubular reactor greatly, the floor area of apparatus of the present invention only be routine chamber installation 1/5th;
2. the control accuracy of wastewater pH adjusting can reach desired value ± 0.2pH;
3. the applied in any combination of mixer and balanced device can guarantee that pH measures and the stability of control, has eliminated the fluctuation of pH;
4. the structure of two-stage reactor has satisfied the demand that wide cut pH adjusts, when the pH span of control limit of control up to 6 the time, apparatus of the present invention still can guarantee the stable realization of target control value;
5. the discharge of defective waste water has been avoided in the setting of reverse flow valve, and the water outlet pH value of strict control apparatus of the present invention meets target control value.
Description of drawings
Further specify the features and advantages of the present invention below in conjunction with the drawings and specific embodiments, wherein:
Fig. 1 is the device for adjusting pH value of waste water structural representation of first embodiment of the invention;
Fig. 2 is the device for adjusting pH value of waste water structural representation of second embodiment of the invention.
Embodiment
First embodiment
Fig. 1 is the device for adjusting pH value of waste water structural representation of first embodiment of the invention.This device mainly comprises the preconditioning reactor 2 of hydraulic pipeline 1, tubular type and whole conditioned reaction device 3, dosing actuator 4 and the controller 6 of tubular type.Wherein hydraulic pipeline 1 is provided with waste water discharge pump 11, in order to drawing water from wastewater trough, and is provided with soda acid and switches sensor 12, to measure the pH value of waste water on the hydraulic pipeline 1.Preconditioning reactor 2 connects wastewater trough 10 by hydraulic pipeline 1, and whole conditioned reaction device 3 links to each other with preconditioning reactor 2 by inlet pipeline 53.Dosing actuator 4 comprises the sour medicine-chest 41 of storing acid medicine and the alkali medicine-chest 43 of storing basic agent.41 outlets of acid medicine-chest are provided with acid adding valve 42, and 43 outlets of alkali medicine-chest are provided with alkali addition valve 44.Be connected dosing pipe 51,52 behind acid adding valve 42 and the alkali addition valve 44, dosing pipe 51,52 is connected respectively to preconditioning reactor 2 and whole conditioned reaction device 3, dosing pipe 51 is provided with one-level dosing pump 45 simultaneously, dosing pipe 52 is provided with secondary dosing pump 46, and the medicament flow of dosing pump 45,46 can be regulated.The structure of following mask body narration preconditioning reactor 2 and whole conditioned reaction device 3.
Preconditioning reactor 2 is used to carry out the preconditioning of pH value, and it comprises elementary mixer 21 and first level equaliser 22.Elementary mixer 21 is connected with dosing pipe 51 with hydraulic pipeline 1, its effect is that medicament (acid or alkalescence) that makes adding and the waste water that passes through mix as far as possible rapidly and fully, internal mixer being provided with helps the blade that liquid stirs, waste water and medicament are subjected to the leaf baffle bump and quicken to mix in elementary mixer 21, help the carrying out of acid-base neutralization reaction.When the linear velocity of elementary mixer 21 is than very fast and dosing owing to flow through of short duration stop gap is arranged, certain fluctuation is arranged so leave the pH value of waste water of elementary mixer 21.Just level equaliser 22 is connected elementary mixer 21 outlets, and it is the container of a profile rule, and effect is the reaction time that increases waste water, to eliminate the fluctuation of pH value of waste water, makes water outlet pH value more steady.Level equaliser 22 outlets just are provided with one-level pH sensor 23, are used to measure the pH value of waste water of balanced device 22 outlets.PH value of waste water and preregulated pH value reference mark (between pending pH value of waste water and target pH value) are compared, can be used as the foundation of the medicament flow regulation of dosing pump 45, this adjustment process will be narrated below.
Whole conditioned reaction device 3 is used to carry out regulating eventually of pH value, and it comprises level mixer 31 and whole level equaliser 32 eventually.Wherein level mixer 31 links to each other with first level equaliser 22 outlets of preconditioning reactor 2 eventually.Level mixer 31, whole level equaliser 32 have identical structure and effect with elementary mixer 21, first level equaliser 22 respectively eventually, therefore repeat no more.Whole level equaliser 32 outlets are provided with two-stage pH sensing device 33, are used to measure the pH value of waste water of balanced device 32 outlets.PH value of waste water and target pH value reference mark are compared, can be used as the foundation of the medicament flow regulation of dosing pump 46.In addition, the outlet of whole level equaliser 32 is provided with the delivery pipe 54 and the recirculatory pipe 55 of waste water.Delivery pipe 54 is provided with bleed valve 540.Recirculatory pipe 55 is communicated to wastewater trough 10, and recirculatory pipe is provided with reverse flow valve 550.When the outlet from whole level equaliser 32 does not reach emission request, can close bleed valve 540, open reverse flow valve 550, waste water is returned wastewater trough 10.
The course of work of the whole device of controller 6 controls mainly comprises the adjusting that adds the garden sorrel formula and add the switching of alkali pattern and enter the medicament flow of preconditioning reactor 2, whole conditioned reaction device 3.It is as follows with the handoff procedure that adds the alkali pattern wherein to add the garden sorrel formula:
Soda acid is switched pH value and the target pH value that sensor 12 measures compare, when the pH of waste water value during greater than target pH value, controller 6 is in system to add the garden sorrel formula, cut out alkali addition valve 44, and the selection acid medicine is imported dosing pipe; When the pH of waste water value during less than target pH value, controller 6 is in system to add the alkali pattern, cut out acid adding valve 42, select basic agent input dosing pipe.
The adjustment process of medicament flow is a closed-loop control process, medicament flow regulation with preconditioning reactor 2 is an example, controller 6 can be gathered the data of the one-level pH sensor 23 of level equaliser 22 outlets just, calculate the deviate at pH value of waste water and preregulated pH value reference mark, adjust control signal in view of the above dosing pump 45.Preferably, 6 pairs of deviates of controller are carried out PID (proportion integration differentiation) computing, calculate the control signal to dosing pump 45, realize the adjustment to flow, opportunity and the frequency of dosing.Because the PID regulatory function is very ripe prior art, so the present invention no longer is described in detail.
Workflow below in conjunction with object lesson explanation first embodiment of the invention:
With the pH value is that about 3 acid waste water adds alkali (NaOH) to be adjusted to 9.0 is example.The preregulated reference mark of pH is set in 5.5, and the target control point that pH regulates eventually is set in 9.0.Start waste water discharge pump 11, the water inlet pH value that soda acid switching sensor 12 is measured is less than target control point 9.0, and controller 6 sends signal, closes acid adding valve 42, system is in adds the alkali pattern.Determine when initial as coefficients such as proportionality constant, derivative constant, integration constants, to make preconditioning reactor 2 and whole conditioned reaction device 3 enter metastable PID state of a control by the pid control parameter that pH preconditioning and pH regulate eventually in system.Can revise a little major parameter by suitable human intervention simultaneously, the control effect is improved.In definite process and normal handling process of pid control parameter, if from the waste water miss the mark reference mark that whole level equaliser 32 is exported, controller 6 can cut out bleed valve 540, and reverse flow valve 550 is opened, and the water that does not reach requirement is flow back to wastewater trough 10.When pH preconditioning steady operation, the pH value of waste water of first level equaliser 22 outputs of preconditioning reactor 2 is about 5.5; When the waste water of whole level equaliser 32 outputs of the whole conditioned reaction device 3 of pH is stable when reaching impact point 9.0, system enters normal operating condition, and the pH value of water outlet can be stabilized in 9.0 ± 0.2pH.
Alkaline waste water with pH value 11 adds acid (HCl or H
2SO
4) be adjusted to 5.0 for example.The preregulated pH of pH reference mark setting value is fixed on 9.0, and the target control point that pH regulates eventually is set in 5.0.Start waste water discharge pump 11, the water inlet pH value that soda acid switching sensor 12 is measured is greater than the target control point, and controller 6 sends signal, closes alkali addition valve 44, system is in adds the garden sorrel formula.Determine equally when initial to make preconditioning reactor 2 and whole conditioned reaction device 3 enter metastable PID state of a control by the pid control parameter that pH preconditioning and pH regulate eventually in system.In definite process and normal handling process of pid control parameter, if from the waste water miss the mark reference mark that whole level equaliser 32 is exported, controller 6 can cut out bleed valve 540, and reverse flow valve 550 is opened, and the water that does not reach requirement is flow back to wastewater trough 10.When pH preconditioning steady operation, the pH value of waste water of first level equaliser 22 outputs of preconditioning reactor 2 is about 9.0; When the waste water of whole level equaliser 32 outputs of the whole conditioned reaction device 3 of pH is stable when reaching desired value 5.0, system enters normal operating condition, and the pH value of water outlet can be stabilized in 5.0 ± 0.2pH.
More than two control examples that add bronsted lowry acids and bases bronsted lowry be waste water pH value and target control point differ the comparatively situation of great disparity, if the two is more or less the same, then single-stage control also can realize the accurate adjusting of pH, the measurement function of soda acid switching this moment sensor 12 is still worked, but preconditioning reactor 2 or whole conditioned reaction device 3 can leave unused, and the pH value of directly using one-level to regulate waste water is adjusted to the target control point.
Second embodiment
If the pH value of waste water is more stable, and the amplitude of regulating is less, can design single-stage pH regulator device, to reduce manufacturing cost.
Fig. 2 is the device for adjusting pH value of waste water structural representation of second embodiment of the invention.Different with Fig. 1 is, has omitted preconditioning reactor 2 and one-level dosing pump 45 among Fig. 2, and whole conditioned reaction device 3 directly links to each other with hydraulic pipeline 1.Mixing the level mixer 31 eventually with the medicament that dosing pump 46 pumps into from the waste water of hydraulic pipeline 1 input, gathering in balanced device 32 then is at last from balanced device 32 outputs.The pH reference mark of whole conditioned reaction device 3 is final objective pH value.
The same with first embodiment, in pH value adjustment process, the pH sensor 33 that is located at balanced device 32 outlet measure outlet pH value of waste water and with target pH value relatively, adjust control signal according to the deviate of the two, thereby control the flow of medicament dosing pump 46.Preferably, 6 pairs of deviates of controller are carried out PID (proportion integration differentiation) computing, calculate the control signal to dosing pump 46, realize the adjustment to flow, opportunity and the frequency of dosing.
The course of work of A reactor and first embodiment are similar in the present embodiment, therefore repeat no more.
Above embodiment explanation only is preferred embodiment explanation of the present invention, and those skilled in the art can make the replacement and the modification of other all equivalence according to the above embodiment of the present invention explanation.Yet these all equivalences of doing according to the embodiment of the invention are replaced and are revised, and belong to invention spirit of the present invention and reach by in the claim that claim defined.
Claims (6)
1. device for adjusting pH value of waste water is characterized in that comprising:
One hydraulic pipeline which is provided with the soda acid switching sensor that a waste water discharge pump and that extracts waste water from wastewater trough is measured pH value of waste water;
One dosing actuator comprises sour medicine-chest and alkali medicine-chest, and described sour medicine-chest and alkali medicine-chest are through dosing pipe output acid medicine or basic agent, and the outlet of sour medicine-chest is provided with acid adding valve, and the outlet of alkali medicine-chest is provided with alkali addition valve, and described dosing pipe is provided with dosing pump;
One whole conditioned reaction device comprises: whole level mixer, and input waste water and acid medicine or basic agent carry out rapid mixing and reaction; Whole level equaliser is assembled from the waste water of described mixer input and is discharged then;
One controller, be electrically connected to described soda acid and switch sensor, acid adding valve, alkali addition valve and dosing pump, the more described soda acid of described controller switches the pH value of waste water and a target pH value of sensor measurement, controls the switching of described acid adding valve, alkali addition valve and the operation of described dosing pump according to comparative result.
2. device for adjusting pH value of waste water as claimed in claim 1, it is characterized in that, described whole level equaliser outlet is provided with the pH value sensor that is used to measure the outlet pH value of waste water, described pH value sensor is connected with described controller, described controller calculates the pH value of waste water of whole level equaliser outlet and the deviation of a target pH value, adjusts the flow of described dosing pump in view of the above.
3. device for adjusting pH value of waste water as claimed in claim 1 is characterized in that the outlet of described whole level equaliser is provided with delivery pipe, and described delivery pipe is provided with bleed valve, and described bleed valve is electrically connected with described controller.
4. as claim 1 or 3 described device for adjusting pH value of waste water, it is characterized in that the outlet of described whole level equaliser is provided with recirculatory pipe, described recirculatory pipe is communicated to described wastewater trough, and recirculatory pipe is provided with reverse flow valve, and described reverse flow valve is electrically connected with described controller.
5. device for adjusting pH value of waste water as claimed in claim 1 is characterized in that, also comprises a preconditioning reactor, is located between described hydraulic pipeline and the described whole conditioned reaction device, and the preconditioning reactor comprises:
Elementary mixer from described hydraulic pipeline and described dosing pipe input waste water and acid medicine or basic agent, carries out rapid mixing and reaction respectively;
Just level equaliser is assembled from the waste water of described elementary mixer input, exports described whole conditioned reaction device then to.
6. device for adjusting pH value of waste water as claimed in claim 5, it is characterized in that, the described outlet of level equaliser just is provided with the pH value sensor of the pH value of waste water that is used to measure outlet, described pH value sensor is connected with described controller, described controller calculates the pH value of waste water of level equaliser outlet just and the deviation of a pre-adjust pH, adjusts the flow of described dosing pump in view of the above.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006101473436A CN101200326B (en) | 2006-12-15 | 2006-12-15 | Device for adjusting pH value of waste water |
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| CN2006101473436A CN101200326B (en) | 2006-12-15 | 2006-12-15 | Device for adjusting pH value of waste water |
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| CN101200326A CN101200326A (en) | 2008-06-18 |
| CN101200326B true CN101200326B (en) | 2011-11-02 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102249391B (en) * | 2011-07-20 | 2012-11-07 | 沈阳卡斯特科技发展有限公司 | Anion and cation bed regeneration sewage treatment pH control system |
| CN103455055A (en) * | 2013-08-29 | 2013-12-18 | 施勒智能建筑系统（上海）有限公司 | Method for adjusting pH value through multipoint detection fuzzy PID control in raw water treatment |
| CN103713664B (en) * | 2013-12-18 | 2016-02-03 | 长沙中联重科环卫机械有限公司 | Sewage treatment control method, device, system and sewage treatment facility |
| CN105320169A (en) * | 2015-11-17 | 2016-02-10 | 沈阳溢源设备制造有限公司 | A sterilization and disinfection solution preparing device and a mixed liquor PH value regulating and controlling method |
| CN107219097B (en) * | 2017-07-26 | 2019-11-19 | 泰科检测科技江苏有限公司 | A kind of sewage sampling detection device |
| CN107665001A (en) * | 2017-10-27 | 2018-02-06 | 深圳大学 | PH adjusting meanss |
| CN110262577A (en) * | 2019-08-02 | 2019-09-20 | 湖南柿竹园有色金属有限责任公司 | A kind of PH control method based on ion concentration |
| CN112858615A (en) * | 2021-01-21 | 2021-05-28 | 西安热工研究院有限公司 | Water sample pH adjusting device and working method thereof |
| CN113233567A (en) * | 2021-06-21 | 2021-08-10 | 昆山三一环保科技有限公司 | Waste water pH adjusting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87201791U (en) * | 1987-02-07 | 1987-11-04 | 天津市自来水公司 | Drinking water fluorine removal device by controlling primary water ph |
| CN2055953U (en) * | 1989-09-28 | 1990-04-11 | 哈尔滨工业大学 | On-line automatic controller for solution ph value |
| CN200995977Y (en) * | 2006-12-15 | 2007-12-26 | 上海轻工业研究所有限公司 | Waste-water pH-valve adjuster |
-
2006
- 2006-12-15 CN CN2006101473436A patent/CN101200326B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87201791U (en) * | 1987-02-07 | 1987-11-04 | 天津市自来水公司 | Drinking water fluorine removal device by controlling primary water ph |
| CN2055953U (en) * | 1989-09-28 | 1990-04-11 | 哈尔滨工业大学 | On-line automatic controller for solution ph value |
| CN200995977Y (en) * | 2006-12-15 | 2007-12-26 | 上海轻工业研究所有限公司 | Waste-water pH-valve adjuster |
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